B Scheduler #

A custom Flutter scheduler widget with intuitive pinch-to-zoom gestures, seamless infinite scrolling, and multiple view modes (day, week, month). Features smooth timeline layouts and supports custom data sources including Google Calendar integration.

Features #

• Multiple View Modes: Switch between day, week, and month views
• Intuitive Gestures: Pinch-to-zoom for seamless transitions between view modes
• Infinite Scrolling: Smooth scrolling across all time ranges
• Customizable Styling: Full control over colors, fonts, and layout
• Flexible Data Sources: Callback-based architecture supports any data source
• Real-time Updates: Current time indicator automatically updates
• Touch Events: Tap handling for scheduler items

Day View	Week View	Month View

Getting Started #

Add b_scheduler to your pubspec.yaml:

dependencies:
  b_scheduler: ^0.0.3

Then run:

flutter pub get

Usage #

Basic Implementation #

import 'package:flutter/material.dart';
import 'package:b_scheduler/b_scheduler.dart';

class SchedulerScreen extends StatefulWidget {
  @override
  State<SchedulerScreen> createState() => _SchedulerScreenState();
}

class _SchedulerScreenState extends State<SchedulerScreen> {
  late final BSchedulerViewController controller;

  @override
  void initState() {
    super.initState();
    controller = BSchedulerViewController(
      onRangeChanged: (start, end) async {
        // Fetch items for the visible date range
        return await fetchItems(start, end);
      },
    );
  }

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: BSchedulerView(
        controller: controller,
        onTapItem: (item) {
          print('Tapped: ${item.title}');
        },
      ),
    );
  }

  Future<List<BSchedulerItem>> fetchItems(DateTime start, DateTime end) async {
    // Return your scheduler items
    return [
      BSchedulerItem(
        title: "Meeting",
        startTime: DateTime.now().copyWith(hour: 10, minute: 0),
        endTime: DateTime.now().copyWith(hour: 11, minute: 0),
      ),
    ];
  }
}

Customization #

You can customize the scheduler's appearance using BSchedulerStyle:

BSchedulerView(
  controller: controller,
  style: BSchedulerStyle(
    primaryColor: Colors.blue,
    backgroundColor: Colors.white,
    gridLineColor: Colors.grey[300],
    // ... many more style options
  ),
)

Controller Methods #

The BSchedulerViewController provides several methods for programmatic control:

// Change view mode
controller.changeMode(BSchedulerMode.week);

// Navigate to specific date
controller.scrollToToday();
controller.scrollToNextScreen();
controller.scrollToPrevScreen();

// Listen to mode changes
controller.currentModeNotifier.addListener(() {
  print('Mode changed to: ${controller.currentModeNotifier.value}');
});

Data Source Integration #

The scheduler uses a callback-based approach for data loading, making it easy to integrate with any backend:

BSchedulerViewController(
  onRangeChanged: (start, end) async {
    // Fetch from REST API
    final response = await http.get('/api/events?start=$start&end=$end');
    return parseEvents(response);

    // Or fetch from local database
    return await database.getEvents(start, end);

    // Or integrate with Google Calendar
    return await googleCalendar.getEvents(start, end);
  },
)

Example #

A comprehensive example with Google Calendar integration is available in the example directory. To run it:

cd example
flutter run

See example/README.md for detailed setup instructions.

Additional Information #

Contributing #

Contributions are welcome! Please feel free to submit a Pull Request.

Issues #

If you encounter any issues or have feature requests, please file them on GitHub Issues.

License #

This project is licensed under the MIT License - see the LICENSE file for details.